本文介绍普通化学实验室通风系统的设计，并对局部排风设备的几种主要型式加以具体分析。
Presents the ventilating system design of the chemical laboratory. Analyses several kinds of local ventilating devices.
那时，可以少量地买到多种普通化学试剂，我就在家里建了一个很小的实验室，用自制的简单仪器研究化学反应。
At that time one could buy small amounts of many common chemicals and I made a little laboratory at home, with improvised9 equipment, to study chemical reactions.
那时，可以少量地买到多种普通化学试剂，我就在家里建了一个很小的实验室，用自制的简单仪器研究化学反应。
At that time one could buy small amounts of many common chemicals and I made a little laboratory at home, with improvised9 equipment, to study chemical reactions.
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